Hi there. Thank you for your idea. I was hoping you could share more details on your use case here. Generally, release phases are used for planning purposes -- grouping work to be delivered on a timeline. In that regard, we are unlikely to introduce external release dates since they are typically displayed on a timeline (which is date-based.) It would be helpful to understand more about how you are using release phases in your roadmaps and perhaps we could make some suggestions for how to get what you are looking for.